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          Crypto++ AES加解密
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        <h1 id="Preface"><a href="#Preface" class="headerlink" title="Preface"></a>Preface</h1><p>之前遇到的 js-CryptoJS 与 c++ 进行AES加解密出现问题，今天再来试一下了。</p>
<h1 id="Content"><a href="#Content" class="headerlink" title="Content"></a>Content</h1><h2 id="Cryptopp"><a href="#Cryptopp" class="headerlink" title="Cryptopp"></a>Cryptopp</h2><p>嗯，放弃了openssl 的 aes 加解密接口，转而使用 Cryptopp 也就是 Ctypro++</p>
<h3 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h3><p>先从 <a target="_blank" rel="external nofollow noopener noreferrer" href="https://github.com/weidai11/cryptopp">cryptopp On github</a> 上下载源代码，然后再源代码目录下的 GNUmakefile 中第 75 行添加如下代码：</p>
<figure class="highlight makefile"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">CXXFLAGS += -pipe -fPIC</span><br></pre></td></tr></table></figure>

<p>先执行：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">make libcryptopp.a libcryptopp.so cryptest.exe</span><br></pre></td></tr></table></figure>

<p>成功的话，再执行：</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">make install PREFIX=/usr/<span class="built_in">local</span></span><br></pre></td></tr></table></figure>

<p>确保自己是 su 或者使用了 sudo。</p>
<p>确保起见，第二个命令执行成功之后再执行一下：</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ldconfig</span><br></pre></td></tr></table></figure>

<p>这样， Cryptopp 就成功的在系统里面安装了。</p>
<h3 id="参考"><a href="#参考" class="headerlink" title="参考"></a>参考</h3><p><a target="_blank" rel="external nofollow noopener noreferrer" href="https://www.lwlwq.com/post-cryptopp.html">centos 64bit编译cryptopp</a></p>
<p><a target="_blank" rel="external nofollow noopener noreferrer" href="https://www.cryptopp.com/wiki/Linux">cryptoppwiki</a></p>
<h3 id="制作测试项目"><a href="#制作测试项目" class="headerlink" title="制作测试项目"></a>制作测试项目</h3><p>在 Qt Creator 中新建一个项目，最好是纯 c++ 控制台项目。</p>
<p>在 .pro 中添加：</p>
<figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">LIBS += /usr/local/lib/libcryptopp.a</span><br><span class="line"></span><br><span class="line">LIBS += -lcurl -lcryptopp  -lsnappy  -lrt -lm -lz -ldl</span><br><span class="line"></span><br><span class="line">INCLUDEPATH += /usr/local/include/cryptopp</span><br></pre></td></tr></table></figure>

<p>测试代码 main.cpp 如下：</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;iostream&gt;</span></span></span><br><span class="line"><span class="comment">// cryptopp</span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;iomanip&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;modes.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;aes.h&gt;</span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string">&lt;filters.h&gt;</span></span></span><br><span class="line"></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span></span></span><br><span class="line"><span class="function"></span>&#123;</span><br><span class="line">    <span class="built_in">string</span> keyStr = <span class="string">&quot;0123456789abcdef&quot;</span>;</span><br><span class="line">    <span class="built_in">string</span> ivStr = <span class="string">&quot;abcdefghjklmnopq&quot;</span>;</span><br><span class="line">    CryptoPP::byte key[CryptoPP::AES::DEFAULT_KEYLENGTH],iv[CryptoPP::AES::BLOCKSIZE];</span><br><span class="line">    <span class="built_in">memcpy</span>(key, keyStr.c_str(),CryptoPP::AES::DEFAULT_KEYLENGTH);</span><br><span class="line">    <span class="built_in">memcpy</span>(iv, ivStr.c_str(), CryptoPP::AES::BLOCKSIZE);</span><br><span class="line"><span class="comment">//    memset(key,0x00,CryptoPP::AES::DEFAULT_KEYLENGTH);</span></span><br><span class="line"><span class="comment">//    memset(iv,0x00,CryptoPP::AES::BLOCKSIZE);</span></span><br><span class="line">    <span class="built_in">string</span> plaintext = <span class="string">&quot;123456boy&quot;</span>;</span><br><span class="line">    <span class="built_in">string</span> ciphertext;</span><br><span class="line">    <span class="built_in">string</span> decryptedtext;</span><br><span class="line"></span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="string">&quot;Plain Text (&quot;</span> &lt;&lt; plaintext.size() &lt;&lt; <span class="string">&quot;) bytes&quot;</span>&lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; plaintext;</span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="built_in">endl</span> &lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line"></span><br><span class="line">    CryptoPP::<span class="function">AES::Encryption <span class="title">aesEncryption</span><span class="params">(key, CryptoPP::AES::DEFAULT_KEYLENGTH)</span></span>;</span><br><span class="line">    CryptoPP::<span class="function">CBC_Mode_ExternalCipher::Encryption <span class="title">cbcEncryption</span><span class="params">(aesEncryption, iv)</span></span>;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">    <span class="function">CryptoPP::StreamTransformationFilter <span class="title">stfEncryptor</span><span class="params">(cbcEncryption, <span class="keyword">new</span> CryptoPP::StringSink(ciphertext))</span></span>;</span><br><span class="line">    stfEncryptor.Put(<span class="keyword">reinterpret_cast</span>&lt;<span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">char</span>*&gt;(plaintext.c_str()),plaintext.length());</span><br><span class="line">    stfEncryptor.MessageEnd();</span><br><span class="line"></span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="string">&quot;Cipher text (&quot;</span> &lt;&lt; ciphertext.size() &lt;&lt; <span class="string">&quot;) bytes&quot;</span> &lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line">    <span class="keyword">for</span>(<span class="keyword">int</span> i = <span class="number">0</span>; i &lt; ciphertext.size(); i++)</span><br><span class="line">    &#123;</span><br><span class="line">        <span class="built_in">cout</span> &lt;&lt; <span class="string">&quot;0x&quot;</span> &lt;&lt; <span class="built_in">std</span>::hex &lt;&lt; (<span class="number">0xff</span> &amp; <span class="keyword">static_cast</span>&lt;CryptoPP::byte&gt;(ciphertext[i])) &lt;&lt; <span class="string">&quot; &quot;</span>;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="built_in">endl</span> &lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line"></span><br><span class="line">    CryptoPP::<span class="function">AES::Decryption <span class="title">aesDecryption</span><span class="params">(key, CryptoPP::AES::DEFAULT_KEYLENGTH)</span></span>;</span><br><span class="line">    CryptoPP::<span class="function">CBC_Mode_ExternalCipher::Decryption <span class="title">cbcDecryption</span><span class="params">(aesDecryption, iv)</span></span>;</span><br><span class="line"></span><br><span class="line">    <span class="function">CryptoPP::StreamTransformationFilter <span class="title">stfDecryptor</span><span class="params">(cbcDecryption, <span class="keyword">new</span> CryptoPP::StringSink(decryptedtext))</span></span>;</span><br><span class="line">    stfDecryptor.Put(<span class="keyword">reinterpret_cast</span>&lt;<span class="keyword">const</span> <span class="keyword">unsigned</span> <span class="keyword">char</span>*&gt;(ciphertext.c_str()),ciphertext.size());</span><br><span class="line">    stfDecryptor.MessageEnd();</span><br><span class="line"></span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="string">&quot;Decrypted Text :&quot;</span> &lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; decryptedtext;</span><br><span class="line">    <span class="built_in">cout</span> &lt;&lt; <span class="built_in">endl</span> &lt;&lt; <span class="built_in">endl</span>;</span><br><span class="line">    <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br></pre></td></tr></table></figure>

<p>Build -&gt; Run, 结果如下：</p>
<blockquote>
<p>Plain Text (9) bytes<br>123456boy</p>
<p>Cipher text (16) bytes<br>0xa5 0xf3 0x7e 0xb0 0x81 0x55 0xa7 0x8b 0x88 0x99 0x44 0xca 0x48 0xfd 0x87 0x14 </p>
<p>Decrypted Text :<br>123456boy</p>
</blockquote>
<h3 id="参考-1"><a href="#参考-1" class="headerlink" title="参考"></a>参考</h3><p><a target="_blank" rel="external nofollow noopener noreferrer" href="https://stackoverflow.com/questions/12306956/example-of-aes-using-crypto">example-of-aes-using-crypto:Stackoverflow</a></p>
<h2 id="CryptoJS"><a href="#CryptoJS" class="headerlink" title="CryptoJS"></a>CryptoJS</h2><h3 id="代码"><a href="#代码" class="headerlink" title="代码"></a>代码</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> CryptoJS = <span class="built_in">require</span>(<span class="string">&quot;crypto-js&quot;</span>);</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">test1</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">    <span class="keyword">var</span> str = <span class="string">&quot;123456boy&quot;</span>;</span><br><span class="line">    <span class="keyword">var</span> key = <span class="string">&quot;0123456789abcdef&quot;</span>;</span><br><span class="line">    <span class="keyword">var</span> iv = <span class="string">&quot;abcdefghjklmnopq&quot;</span>;</span><br><span class="line">    key = CryptoJS.enc.Latin1.parse(key);</span><br><span class="line">    iv = CryptoJS.enc.Latin1.parse(iv);</span><br><span class="line"></span><br><span class="line">    <span class="keyword">var</span> options = &#123;</span><br><span class="line">        iv : iv,</span><br><span class="line">        mode : CryptoJS.mode.CBC,</span><br><span class="line">        padding : CryptoJS.pad.Pkcs7</span><br><span class="line">    &#125;;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">var</span> encrypted = CryptoJS.AES.encrypt(str, key, options);</span><br><span class="line">    encrypted = encrypted.toString();</span><br><span class="line">    <span class="built_in">console</span>.log(encrypted);</span><br><span class="line">&#125;</span><br><span class="line">test1();</span><br></pre></td></tr></table></figure>

<p>调试的时候，可以跟进 <code>encrypted = encrypted.toString();</code> 这段代码，跟进到 enc-base64.js 文件里面：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line">stringify: <span class="function"><span class="keyword">function</span> (<span class="params">wordArray</span>) </span>&#123;</span><br><span class="line">	            <span class="comment">// Shortcuts</span></span><br><span class="line">	            <span class="keyword">var</span> words = wordArray.words;</span><br><span class="line">	            <span class="keyword">var</span> sigBytes = wordArray.sigBytes;</span><br><span class="line">	            <span class="keyword">var</span> map = <span class="built_in">this</span>._map;</span><br><span class="line"></span><br><span class="line">	            <span class="comment">// Clamp excess bits</span></span><br><span class="line">	            wordArray.clamp();</span><br><span class="line"></span><br><span class="line">	            <span class="comment">// Convert</span></span><br><span class="line">	            <span class="keyword">var</span> base64Chars = [];</span><br><span class="line">	            <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; sigBytes; i += <span class="number">3</span>) &#123;</span><br><span class="line">	                <span class="keyword">var</span> byte1 = (words[i &gt;&gt;&gt; <span class="number">2</span>]       &gt;&gt;&gt; (<span class="number">24</span> - (i % <span class="number">4</span>) * <span class="number">8</span>))       &amp; <span class="number">0xff</span>;</span><br><span class="line">	                <span class="keyword">var</span> byte2 = (words[(i + <span class="number">1</span>) &gt;&gt;&gt; <span class="number">2</span>] &gt;&gt;&gt; (<span class="number">24</span> - ((i + <span class="number">1</span>) % <span class="number">4</span>) * <span class="number">8</span>)) &amp; <span class="number">0xff</span>;</span><br><span class="line">	                <span class="keyword">var</span> byte3 = (words[(i + <span class="number">2</span>) &gt;&gt;&gt; <span class="number">2</span>] &gt;&gt;&gt; (<span class="number">24</span> - ((i + <span class="number">2</span>) % <span class="number">4</span>) * <span class="number">8</span>)) &amp; <span class="number">0xff</span>;</span><br><span class="line"></span><br><span class="line">	                <span class="keyword">var</span> triplet = (byte1 &lt;&lt; <span class="number">16</span>) | (byte2 &lt;&lt; <span class="number">8</span>) | byte3;</span><br><span class="line"></span><br><span class="line">	                <span class="keyword">for</span> (<span class="keyword">var</span> j = <span class="number">0</span>; (j &lt; <span class="number">4</span>) &amp;&amp; (i + j * <span class="number">0.75</span> &lt; sigBytes); j++) &#123;</span><br><span class="line">	                    base64Chars.push(map.charAt((triplet &gt;&gt;&gt; (<span class="number">6</span> * (<span class="number">3</span> - j))) &amp; <span class="number">0x3f</span>));</span><br><span class="line">	                &#125;</span><br><span class="line">	            &#125;</span><br><span class="line"></span><br><span class="line">	            <span class="comment">// Add padding</span></span><br><span class="line">	            <span class="keyword">var</span> paddingChar = map.charAt(<span class="number">64</span>);</span><br><span class="line">	            <span class="keyword">if</span> (paddingChar) &#123;</span><br><span class="line">	                <span class="keyword">while</span> (base64Chars.length % <span class="number">4</span>) &#123;</span><br><span class="line">	                    base64Chars.push(paddingChar);</span><br><span class="line">	                &#125;</span><br><span class="line">	            &#125;</span><br><span class="line"></span><br><span class="line">	            <span class="keyword">return</span> base64Chars.join(<span class="string">&#x27;&#x27;</span>);</span><br><span class="line">	        &#125;,</span><br></pre></td></tr></table></figure>



<p>会发现，这里的 byte1,byte2,byte3  就是 Cryptopp 上面输出的：</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">0xa5 0xf3 0x7e 0xb0 0x81 0x55 0xa7 0x8b 0x88 0x99 0x44 0xca 0x48 0xfd 0x87 0x14 </span><br></pre></td></tr></table></figure>

<h2 id="结果"><a href="#结果" class="headerlink" title="结果"></a>结果</h2><p>说明 CryptoJS 与 C++ Cryptopp 是可以相互之间加解密的。</p>
<h2 id="问题"><a href="#问题" class="headerlink" title="问题"></a>问题</h2><h3 id="Error-in-home-workspace-bin-MyTest’-double-free-or-corruption-fasttop-0x00000000025c3160"><a href="#Error-in-home-workspace-bin-MyTest’-double-free-or-corruption-fasttop-0x00000000025c3160" class="headerlink" title="*** Error in `/home/workspace/bin/MyTest’: double free or corruption (fasttop): 0x00000000025c3160 ***"></a>*** Error in `/home/workspace/bin/MyTest’: double free or corruption (fasttop): 0x00000000025c3160 ***</h3><p>运行上面的例子的时候出现这个报错，字面意思： 两次释放或者崩溃</p>
<h2 id="Update"><a href="#Update" class="headerlink" title="Update"></a>Update</h2><p>由于之前不小心删掉了git上clone下来的cryptpp代码，且怀疑double free可能是使用了master版本所致，所以重新clone了分支，然后在目录下运行：</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo make uninstall</span><br></pre></td></tr></table></figure>

<p>来清理当前版本，成功之后，切换到最新的tag分支：</p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git checkout CRYPTOPP_8_2_0</span><br></pre></td></tr></table></figure>

<p>之后按上次正常的流程安装。</p>
<p>跑上次的aes例子之后，果然没有报错了。</p>

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